Improvement in treating vitriomzed phosphates



- am l a m samea p a. 1 ALFRED n'UV noF"BALTIMORE, MARYLAND.

i Letters PatentNa.105,319, am July 12, 1870.

. W" I I I i IMPROVEMENT INTREATING- 'V'ITI'RIOIIIIZEI D -PHOSPHATES.

The Schedule referred to in these Letters Patentand part of the same.

i, ALFRED: DUYALL, ofthe cityand county of Baltimore, State 'of Maryland, (now temporarily rea Sltlillgifl the citynand county of Philadelphia, State.

of Pennsylvania) have invented a Certainlirocess for Treating or Depositing Yitriolized Phosphates, manufactured for fertilizing purposes, of which the followting-is a specifieation.

,"lhe crud'e phosphate, as taken-from the deposit, is

[finely ground or pulverized, and treated or mixed with a given amount of sulphuric 'or, chamber acid, ofa

strength of 48 or 50, corresponding to oil oi'vitriol jot 66?, reducedby water to 50 or 48.

In general practice, in the process of 'vitriolizing phosphates, according to theviews of different manufiietnrers, and the cha'racter'of the phosphates being treated, from twenty to thirty-five per cent. (by weight)of'oil of ,vitriol, diluted to 50, is added to the phosphatebeing treated; and at thesame time,

if dcsired, is added given quantity of Peruvian guano fish, from which the oil has been extracted,

Q giveto the phosphate asnitor salts of ammonia, t

ablepercent. of ammonia. A e l a In com mon practice, the pulverized phosphates are vitriolized and mixed either by hand orin or through an antomatic mixer; thevitriolized phosphates, after pbeing' 'mixed,.are deposited andallowed'to remain in v openbnlk untilsufiiciently dry for the final manipulation. V

t I By my process, I. run or deposit the vitriolizcd mixed phosphate,lwhieh' is in a semi-liquid state, into a tightroom or bin of anyconvenient 'sha-pe'orsize, say of a eapa'city of from two hundred to five hundred I tons, which bin is'constructed at a level of from ten to fifteen feet below the point from which the vitrioli'zed mixed'phosphate falls from the mixer.

fiIrecom-fnend a series of two or morebins adjoining each'other, square in shape, having three-0t their walls permanent, and strongly bniltot'stone, brick, or pitch-pine, with their fronts fitted with tight movable doors, in sections, which are held tight'inposition. by bars and'braces,*andsutiiciently strong to resist the pressure of the semi-liquidagainst them, though bins. may be constructed'singly, ot'any shape, with all their walls movable. a

Iei her cover thc'top' o f the binwith. a number of tightly-fitting movable hatches, and place in one angle, or any convenient part of the bin, a line for the more convenient.

escapcof the gases evolved by the action of the acid on the matter being treated, or leave the top entirely open; but the first plan is recommendedas being Operation. 1

I v The movable doors of the binbeingpput-up and seq cured in position, the vitriolized mixed phosphate is rnnin either by hand or automatically, and, being'in a semi-liquid state, fills the bin uniformly; and from the heat generated. by the action of the acid on the carbonate of lime in the phosphate,- the whole inassis kept in a state of. ebullition until the bin is filled, thus producing a more thorough mixing and chemical'acr tion', it is believed, than can be produced in any other known or practicable way; moreover, the mass being confined,-the heat generated'has to'pass through it perpendicularly in its escape, thereby causing arapid evaporation'ot' the watercontained in the mixture, and leavingthe phosphate so dry that, in from forty to fifty hours, 't-hemovable doors may be ,taken down and .the mass broken .u-pand removed for final manip nlation. i

The advantages of my pi'ocess over that in common use, ar,e-

First, great economy of room.

Second, a great saving in labor inmixiug aud .de-

positing, as a'bin offrom four: hundred to five hundred tonscapacity can be filled in from eight to ten hours.-

lhird, andmost important, a more thorough mixing and chemical action, whereby a larger percent. of

the phosphate is rendered soluble.

- Fourth, a quicker and more thorough evaporation" of the water contained. in the matter treated, whereby it is sooner made ready for the final manipulation.

I Claim. 1 claim as my invention- Theprocess for treating or depositing vitriolized' mixed phosphates, substantially as described in the foregoing specification, or any modification thereofinvolving the same general principles.

ALFRED DUVALL.

W'itnesses:

A.'LEsLIs DUVALL.

J. M. OOLGAN. 

